title: [Telomerase activity,PI3K/AKT signaling pathway and cellular biological behavior in HeLa cell line].
abstract: OBJECTIVE
  To investigate the telomerase activity and to document biological behaviors of HeLa cells upon treatment with specific PI3K/AKT signaling pathway inhibitor, LY294002.
  
  
  METHODS
  CCK-8 assay was used to determine IC50 of LY294002. The expressions of total AKT and phosphorylation AKT (P-AKT) were determined using Western blot. Telomerase activity of cell was measured by TRAP-ELISA assay. Cell growth curve, flow cytometry technique and Hoechst33258 stain were used to evaluate the cell growth, cell cycle and apoptosis respectively. Cell migration was determined by cell wound healing assay.
  
  
  RESULTS
  IC50 value of LY294002 of treated HeLa cells was 1.73 mg/L. Western blot showed that LY294002 enabled to decrease P-AKT activity in the presence of same total AKT protein. The cell telomerase activity was decreased to 36.72% in contrast to 98.61% of the control. LY294002 decreased the telomerase activity in HeLa cells, and the growth capacity of the cells was significantly suppressed. The number of cells at G0/G1 phases increased to 66.88% compared with that of the control cells (47.36%). The apoptosis rate also increased from 2.4% to 14.9%. The relative migration distance decreased to 24.6% compared with that of control (62.57%).
  
  
  CONCLUSIONS
  LY294002 inhibition of PI3K/AKT signaling pathway leads to alteration of telomerase activity along with changes of the biological behaviors of the HeLa cells suggesting that regulation of telomerase activity may be closely related to PI3K/AKT signaling pathway.
authors.affiliation: The Key Laboratory of Pathobiology, Ministry of Education, Jilin University, Changchun 130021, China.
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Yu
authors.forename: Ying-Ai
authors.initials: YA
authors.lastname: Shi
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Zhang
authors.forename: Yi-Shu
authors.initials: YS
authors.lastname: Wang
authors.forename: Shan
authors.initials: S
authors.lastname: Wu
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D015153:Blotting, Western; D002460:Cell Line; D002465:Cell Movement / Q000187:drug effects* / Q000502:physiology; D049109:Cell Proliferation / Q000187:drug effects*; D002867:Chromones / Q000494:pharmacology*; D004791:Enzyme Inhibitors / Q000494:pharmacology; D016193:G1 Phase / Q000187:drug effects; D006367:HeLa Cells; D006801:Humans; D009025:Morpholines / Q000494:pharmacology*; D000081082:Phosphoinositide-3 Kinase Inhibitors; D010766:Phosphorylation / Q000187:drug effects; D051057:Proto-Oncogene Proteins c-akt; D015398:Signal Transduction / Q000187:drug effects* / Q000502:physiology; D019098:Telomerase
chemical_list: D002867:Chromones; D004791:Enzyme Inhibitors; D009025:Morpholines; D000081082:Phosphoinositide-3 Kinase Inhibitors; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one; D051057:Proto-Oncogene Proteins c-akt; D019098:Telomerase